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LT1020CS Folha de dados(PDF) 14 Page - Linear Technology

Nome de Peças LT1020CS
Descrição Electrónicos  Micropower Regulator and Comparator
PDF  16 Pages
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Fabricante Electrônico  LINER [Linear Technology]
Página de início  http://www.linear.com
Logo LINER - Linear Technology

LT1020CS Folha de dados(HTML) 14 Page - Linear Technology

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14
LT1020
S
APPLICATI
TYPICAL
50mA Battery Charger and Regulator
Switching Preregulator for Wide Input Voltage Range
1020 TA21
6
1M
51k
VOUT
0.001
µF
+
4
7
8
9
1M
10
µF
2
11
FB
5V
VIN*
3
–
+
LT1020
2.5V
20k
VIN
220k
+
10
µF
+
10
µF
6V
BATTERY
2N2905
* VIN MUST BE GREATER THAN THE
BATTERY VOLTAGE PLUS 1.3V
3.9
Ω
10
µF
+
–
+
+
22
µF
0.01
µF
POST REGULATOR
2
11
3
4
VIN
VOUT
FB
VOUT
5V
100mA
LT1020
1020 TA22
MAINTAINS LOW IQ (< 100µA)
FOR ALL INPUT VOLTAGES
SWITCHER EFFICIENCY = 85%
POST REGULATOR EFFICIENCY = 82%
OVERALL EFFICIENCY = 70%
SWITCHING REGULATOR OUTPUT =
2.5
× (1 + RA/RB). FOR A CLEAN OUTPUT
FROM THE LINEAR REGULATOR SET TO VOUT + 1.2V
VREF
220k
+
100
µF
LT1020
COMPARATOR
VIN
7.5V TO 30V
TO
VREF
(PIN4)
100
µF
1.8M
1M
3.3M
30k
1k
2N3906
100k
10k
2M
RB
1M
2M
30k
RA
1.5M
0.001
µF
SWITCHING
REGULATOR
OUTPUT
4mH
30k
220k
8
7
2N3904
2N3904
2N2222
6



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